1 | /* |
2 | * Copyright (c) 1998-2000, 2009 Apple Inc. All rights reserved. |
3 | * |
4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ |
5 | * |
6 | * This file contains Original Code and/or Modifications of Original Code |
7 | * as defined in and that are subject to the Apple Public Source License |
8 | * Version 2.0 (the 'License'). You may not use this file except in |
9 | * compliance with the License. The rights granted to you under the License |
10 | * may not be used to create, or enable the creation or redistribution of, |
11 | * unlawful or unlicensed copies of an Apple operating system, or to |
12 | * circumvent, violate, or enable the circumvention or violation of, any |
13 | * terms of an Apple operating system software license agreement. |
14 | * |
15 | * Please obtain a copy of the License at |
16 | * http://www.opensource.apple.com/apsl/ and read it before using this file. |
17 | * |
18 | * The Original Code and all software distributed under the License are |
19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
23 | * Please see the License for the specific language governing rights and |
24 | * limitations under the License. |
25 | * |
26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ |
27 | */ |
28 | /* |
29 | Copyright (c) 1998 Apple Computer, Inc. All rights reserved. |
30 | |
31 | HISTORY |
32 | 1998-7-13 Godfrey van der Linden(gvdl) |
33 | Created. |
34 | ]*/ |
35 | #include <IOKit/IOLib.h> |
36 | |
37 | #include <IOKit/IOEventSource.h> |
38 | #include <IOKit/IOWorkLoop.h> |
39 | #include <libkern/Block.h> |
40 | |
41 | #define super OSObject |
42 | |
43 | OSDefineMetaClassAndAbstractStructors(IOEventSource, OSObject) |
44 | |
45 | OSMetaClassDefineReservedUnused(IOEventSource, 0); |
46 | OSMetaClassDefineReservedUnused(IOEventSource, 1); |
47 | OSMetaClassDefineReservedUnused(IOEventSource, 2); |
48 | OSMetaClassDefineReservedUnused(IOEventSource, 3); |
49 | OSMetaClassDefineReservedUnused(IOEventSource, 4); |
50 | OSMetaClassDefineReservedUnused(IOEventSource, 5); |
51 | OSMetaClassDefineReservedUnused(IOEventSource, 6); |
52 | OSMetaClassDefineReservedUnused(IOEventSource, 7); |
53 | |
54 | bool IOEventSource::checkForWork() { return false; } |
55 | |
56 | /* inline function implementations */ |
57 | |
58 | #if IOKITSTATS |
59 | |
60 | #define IOStatisticsRegisterCounter() \ |
61 | do { \ |
62 | reserved->counter = IOStatistics::registerEventSource(inOwner); \ |
63 | } while (0) |
64 | |
65 | #define IOStatisticsUnregisterCounter() \ |
66 | do { \ |
67 | if (reserved) \ |
68 | IOStatistics::unregisterEventSource(reserved->counter); \ |
69 | } while (0) |
70 | |
71 | #define IOStatisticsOpenGate() \ |
72 | do { \ |
73 | IOStatistics::countOpenGate(reserved->counter); \ |
74 | } while (0) |
75 | |
76 | #define IOStatisticsCloseGate() \ |
77 | do { \ |
78 | IOStatistics::countCloseGate(reserved->counter); \ |
79 | } while (0) |
80 | |
81 | #else |
82 | |
83 | #define IOStatisticsRegisterCounter() |
84 | #define IOStatisticsUnregisterCounter() |
85 | #define IOStatisticsOpenGate() |
86 | #define IOStatisticsCloseGate() |
87 | |
88 | #endif /* IOKITSTATS */ |
89 | |
90 | void IOEventSource::signalWorkAvailable() |
91 | { |
92 | workLoop->signalWorkAvailable(); |
93 | } |
94 | |
95 | void IOEventSource::openGate() |
96 | { |
97 | IOStatisticsOpenGate(); |
98 | workLoop->openGate(); |
99 | } |
100 | |
101 | void IOEventSource::closeGate() |
102 | { |
103 | workLoop->closeGate(); |
104 | IOStatisticsCloseGate(); |
105 | } |
106 | |
107 | bool IOEventSource::tryCloseGate() |
108 | { |
109 | bool res; |
110 | if ((res = workLoop->tryCloseGate())) { |
111 | IOStatisticsCloseGate(); |
112 | } |
113 | return res; |
114 | } |
115 | |
116 | int IOEventSource::sleepGate(void *event, UInt32 type) |
117 | { |
118 | int res; |
119 | IOStatisticsOpenGate(); |
120 | res = workLoop->sleepGate(event, type); |
121 | IOStatisticsCloseGate(); |
122 | return res; |
123 | } |
124 | |
125 | int IOEventSource::sleepGate(void *event, AbsoluteTime deadline, UInt32 type) |
126 | { |
127 | int res; |
128 | IOStatisticsOpenGate(); |
129 | res = workLoop->sleepGate(event, deadline, type); |
130 | IOStatisticsCloseGate(); |
131 | return res; |
132 | } |
133 | |
134 | void IOEventSource::wakeupGate(void *event, bool oneThread) { workLoop->wakeupGate(event, oneThread); } |
135 | |
136 | |
137 | bool IOEventSource::init(OSObject *inOwner, |
138 | Action inAction) |
139 | { |
140 | if (!inOwner) |
141 | return false; |
142 | |
143 | owner = inOwner; |
144 | |
145 | if ( !super::init() ) |
146 | return false; |
147 | |
148 | (void) setAction(inAction); |
149 | enabled = true; |
150 | |
151 | if(!reserved) { |
152 | reserved = IONew(ExpansionData, 1); |
153 | if (!reserved) { |
154 | return false; |
155 | } |
156 | } |
157 | |
158 | IOStatisticsRegisterCounter(); |
159 | |
160 | return true; |
161 | } |
162 | |
163 | void IOEventSource::free( void ) |
164 | { |
165 | IOStatisticsUnregisterCounter(); |
166 | |
167 | if ((kActionBlock & flags) && actionBlock) Block_release(actionBlock); |
168 | |
169 | if (reserved) |
170 | IODelete(reserved, ExpansionData, 1); |
171 | |
172 | super::free(); |
173 | } |
174 | |
175 | void IOEventSource::setRefcon(void *newrefcon) |
176 | { |
177 | refcon = newrefcon; |
178 | } |
179 | |
180 | void * IOEventSource::getRefcon() const |
181 | { |
182 | return refcon; |
183 | } |
184 | |
185 | IOEventSource::Action IOEventSource::getAction() const |
186 | { |
187 | if (kActionBlock & flags) return NULL; |
188 | return (action); |
189 | } |
190 | |
191 | IOEventSource::ActionBlock IOEventSource::getActionBlock(ActionBlock) const |
192 | { |
193 | if (kActionBlock & flags) return actionBlock; |
194 | return (NULL); |
195 | } |
196 | |
197 | void IOEventSource::setAction(Action inAction) |
198 | { |
199 | if ((kActionBlock & flags) && actionBlock) Block_release(actionBlock); |
200 | action = inAction; |
201 | } |
202 | |
203 | void IOEventSource::setActionBlock(ActionBlock block) |
204 | { |
205 | if ((kActionBlock & flags) && actionBlock) Block_release(actionBlock); |
206 | actionBlock = Block_copy(block); |
207 | flags |= kActionBlock; |
208 | } |
209 | |
210 | IOEventSource *IOEventSource::getNext() const { return eventChainNext; }; |
211 | |
212 | void IOEventSource::setNext(IOEventSource *inNext) |
213 | { |
214 | eventChainNext = inNext; |
215 | } |
216 | |
217 | void IOEventSource::enable() |
218 | { |
219 | enabled = true; |
220 | if (workLoop) |
221 | return signalWorkAvailable(); |
222 | } |
223 | |
224 | void IOEventSource::disable() |
225 | { |
226 | enabled = false; |
227 | } |
228 | |
229 | bool IOEventSource::isEnabled() const |
230 | { |
231 | return enabled; |
232 | } |
233 | |
234 | void IOEventSource::setWorkLoop(IOWorkLoop *inWorkLoop) |
235 | { |
236 | if ( !inWorkLoop ) |
237 | disable(); |
238 | workLoop = inWorkLoop; |
239 | } |
240 | |
241 | IOWorkLoop *IOEventSource::getWorkLoop() const |
242 | { |
243 | return workLoop; |
244 | } |
245 | |
246 | bool IOEventSource::onThread() const |
247 | { |
248 | return (workLoop != 0) && workLoop->onThread(); |
249 | } |
250 | |